Dosage of epidural morphine analgesia after lower abdominal cancer surgery: a randomized clinical trial among the older adults

Table 2 Postoperative PCA morphine consumption and VAS score in the first 72 h

Variable	1.5 mg epidural morphine	3 mg epidural morphine	4.5 mg epidural morphine	0 mg epidural morphine	P value
Total PCA morphine consumption 72 h	27.2 (5.6)	9.2 (3.5)	6.3 (3.3)	38.1 (4.8)	0.000^*
Baseline VAS Score	4.6 (1.1)	2.6 (1.2)	2.2 (1.6)	5.6 (0.8)	0.000^**
VAS Score at 2 hrs¹	4.8 (1.2)	3 (1.3)	2 (1.6)	5.2 (0.7)	0.000^**
VAS Score at 8 h	4.6 (1.1)	2.8 (1.1)	2.3 (1.4)	5.2 (0.6)	0.000^**
VAS Score at 16 h	4.9 (1)	2 (1.5)	2 (1.5)	5 (0.9)	0.000^**
VAS Score at 24 h	4.5 (0.9)	2.5 (1.1)	2.1 (1.6)	5 (0.8)	0.000^**
VAS Score at 36 h	4.7 (1.1)	2.6 (1.1)	1.8 (1.2)	4.9 (0.8)	0.000^**
VAS Score at 48 h	4.6 (0.9)	2.4 (1)	1.5 (1.2)	5 (1)	0.000^**
VAS Score at 72 h	4 (1)	2 (0.8)	1.7 (1)	4.3 (1.1)	0.000^**

The data are presented as the mean (SD), ¹ h = hours
^*P value = 0.191 (Bonferroni corrected) for 3 mg vs. 4.5 mg
^**indicates a P value > 0.05 (Bonferroni corrected) for 0 mg vs. 1.5 mg and 3 mg vs. 4.5 mg

ISSN: 2047-0525